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    tmpfile

    (PHP 4, PHP 5, PHP 7, PHP 8)

    tmpfile — Erstellt eine temporäre Datei

    Beschreibung

    tmpfile(): resource|false

    Erstellt eine temporäre Datei mit einem eindeutigen Dateinamen im Lese-Schreib-Modus (w+b) und gibt einen Dateizeiger zurück.

    Die Datei wird automatisch gelöscht, wenn sie geschlossen wird (zum Beispiel durch den Aufruf von fclose() oder wenn es keine verbleibenden Referenzen auf das von tmpfile() zurückgegebenen Datei-Handle mehr gibt) oder wenn das Skript beendet wird.

    Achtung

    Wird das Skript unerwartet beendet, wird die temporäre Datei möglicherweise nicht gelöscht.

    Parameter-Liste

    Diese Funktion besitzt keine Parameter.

    Rückgabewerte

    Gibt einen Dateizeiger für die neue Datei zurück, der ähnlich zu dem Zeiger ist, den fopen() zurückgibt. Bei einem Fehler wird false zurückgegeben.

    Beispiele

    Beispiel #1 tmpfile()-Beispiel

    <?php
    $temp     = tmpfile();
    fwrite($temp, "schreiben in Temporärdatei");
    fseek($temp, 0);
    echo     fread($temp, 1024);
    fclose($temp); // dies entfernt die Datei

    Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

    schreiben in Temporärdatei

    Siehe auch

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    User Contributed Notes 7 notes

    up
    81
    bishop
    6 years ago
    To get the underlying file path of a tmpfile file pointer:

    <?php
    $file     = tmpfile();
    $path = stream_get_meta_data($file)['uri']; // eg: /tmp/phpFx0513a
    up
    24
    chris [at] pureformsolutions [dot] com
    19 years ago
    I found this function useful when uploading a file through FTP. One of the files I was uploading was input from a textarea on the previous page, so really there was no "file" to upload, this solved the problem nicely:

    <?php
            # Upload setup.inc
            $fSetup = tmpfile();
            fwrite($fSetup,$setup);
            fseek($fSetup,0);
        if (!    ftp_fput($ftp,"inc/setup.inc",$fSetup,FTP_ASCII)) {
            echo     "<br /><i>Setup file NOT inserted</i><br /><br />";
        }
            fclose($fSetup);
    ?>

    The $setup variable is the contents of the textarea.

    And I'm not sure if you need the fseek($temp,0); in there either, just leave it unless you know it doesn't effect it.
    up
    7
    Anonymous
    8 years ago
    Since this function may not be working in some environments, here is a simple workaround:

    function temporaryFile($name, $content)
    {
        $file = DIRECTORY_SEPARATOR .
                trim(sys_get_temp_dir(), DIRECTORY_SEPARATOR) .
                DIRECTORY_SEPARATOR .
                ltrim($name, DIRECTORY_SEPARATOR);

        file_put_contents($file, $content);

        register_shutdown_function(function() use($file) {
            unlink($file);
        });

        return $file;
    }
    up
    0
    divinity76 at gmail dot com
    4 years ago
    at least on Windows 10 with php 7.3.7, and Debian Linux with php 7.4.2,

    the mode is not (as the documentation states) 'w+' , it is 'w+b'

    (an important distinction when working on Windows systems)
    up
    0
    elm at gmail dot nospamplease dot com
    5 years ago
    To get tmpfile contents:
    <?php
      $tmpfile     = tmpfile();
          $tmpfile_path = stream_get_meta_data($tmpfile)['uri'];
          // ... write to tmpfile ...
          $tmpfile_content = file_get_contents($tmpfile_path);
    ?>

    Perhaps not the best way for production code, but good enough for logging or a quick var_dump() debug run.
    up
    -2
    oremanj at gmail dot com
    17 years ago
    No, the fseek() is necessary - after writing to the file, the file pointer (I'll use "file pointer" to refer to the current position in the file, the thing you change with fseek()) is at the end of the file, and reading at the end of the file gives you EOF right away, which manifests itself as an empty upload.

    Where you might be getting confused is in some systems' requirement that one seek or flush between reading and writing the same file.  fflush() satisfies that prerequisite, but it doesn't do anything about the file pointer, and in this case the file pointer needs moving.

    -- Josh
    up
    -22
    ssandor
    11 years ago
    Beware that PHP's tmpfile is not an equivalent of unix' tmpfile.
    PHP (at least v. 5.3.17/linux I'm using now) creates a file in /tmp with prefix "php", and deletes that file on fclose or script termination.
    So, if you want to be sure that you don't leave garbage even in case of a fatal error, or killed process, you shouldn't rely on this function.
    Use the classical method of deleting the file after creation:
    <?php
    $fn     = tempnam ('/tmp', 'some-prefix-');
    if (    $fn)
      {
            $f = fopen ($fn, 'w+');
            unlink ($fn);  // even if fopen failed, because tempnam created the file
            if ($f)
          {
                do_something_with_file_handle ($f);
          }
      }
    ?>
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